Coronavirus, or COVID-19, has touched nearly every continent and industry since it broke out in China in December. Major sporting events have been canceled or rescheduled. Teams are playing matches to empty arenas, as officials aim to slow the spread of the disease. Japan is one of the leading countries infected, with big questions now swirling around the 2020 Summer Games in Tokyo. Could the Olympics be postponed, or even canceled? ESPN's Kelly Cohen walks us through what's known and what's not, from the International Olympic Committee and other sources.